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A player searching a treasure chest in the Underwater Agility and Thieving area.

The Underwater Agility and Thieving activity is a skilling method that combines the Agility and Thieving skill. This activity is located in the Underwater area of Fossil Island.

The Agility and Thieving pets, giant squirrel and Rocky respectively, cannot be received while training here.

Introduction[edit | edit source]

This activity is a unique way of training the Agility and Thieving skills. It is located in a part of the Underwater area of Fossil Island, behind the shipwreck with Mairin, a mermaid which guards the area. To enter, the player must first remove their fishbowl helmet by the request of Mairin. After entering, players will find a scattered layout of treasure chests and giant clam shells as well as several tunnels, holes and other obstacles, such as currents, which can be traversed.

Every minute, one of the clams or chests will open. An open calm or chest is indicated by a blinking red arrow on the minimap. These opened clams and chests can be searched for mermaid's tears and glistening tears. The first search will always reward on of each tear. Players can continually search these clams and chests until they close after a minute. After the first tears, the droprate will become 1/8.5 searches. When the clam or chest closes, another clam or chest will open, ready to be searched.

Mermaid's tears can be used to buy items from Mairin's Market. Glistening tears can be handed in to Mairin in return for Agility and/or Thieving experience.

Requirements[edit | edit source]

Recommended[edit | edit source]

Getting there[edit | edit source]

  1. While on Fossil Island, go to the Transportation icon.png on the northeastern part of the Mushroom Forest.
  2. Use the small boat to row out to the sea.
  3. While on the small island, right-click the small boat and select the dive option.
  4. Now swim east to arrive at the entrance to this activity.

Mechanics[edit | edit source]

Fishbowl helmet[edit | edit source]

Players partaking in this activity are not allowed to take a fishbowl helmet with them. One fishbowl helmet can be stored on the Pile of Fishbowls, which is located at the entrance to this activity, next to Mairin.

Oxygen[edit | edit source]


When underwater, an oxygen meter will be displayed, reflecting the player's supply of oxygen. This bar starts at 100%. As long as both the fishbowl helmet and diving apparatus are equipped, the bar will remain at 100%. However, the fishbowl helmet is prohibited in the area of this activity. So the oxygen level will get drained by 1% every few seconds. At 10% oxygen, the player's screen will begin flashing red, indicating that they will soon run out of air and drown.

Restoring oxygen[edit | edit source]

A player restoring their oxygen in an air bubble.

To restore the oxygen level, players can:

  • Enter air bubbles, which will increase the oxygen level by 5% every few seconds.
  • Catch Puffer Fish, to receive a pufferfish, which can be held onto and used to instantly restore oxygen by 15%.
  • Equip both the fishbowl helmet and diving apparatus to restore the oxygen level back to 100%. Note however that the fishbowl helmet cannot be worn in the area of this activity, but while training here the Pile of Fishbowls will regularly be passed by the player, which creates a good opportunity to use the fishbowl helmet to instantly restore the oxygen level.

Running out of oxygen[edit | edit source]

Drowning occurs when a player's oxygen levels drop to 0%. It doesn't cause any harm to the player, however a random amount of mermaid's tears between 10 and 20 will be lost if they had any in their inventory. Any tears in the player's bank will be left untouched.

Clams and chests[edit | edit source]

The training area is scattered with clams and chests. Every minute, one of these objects will open. An open clam or chest is indicated on the screen and minimap by a red or yellow blinking arrow.

When opened, these object can be searched for mermaid's tears and glistening tears. The very first clam or chest will not reward any tears, however, every subsequent object will always reward one of each tear on the first search. Additionally, players can keep searching the same clam or chest multiple times, untill it closes. For these extra searches, there is a 1/8.5 chance to receive one of each tear.

Tears[edit | edit source]

There is a 1/8.5 chance that searching a clam or chest more than once will be successful. On a successful search, a mermaid's tear and glistening tear will always be rewarded, as well as a chance of receiving 5-24 numulites or an unidentified fossil varying from small to rare (fossils are obtained this way roughly 1 in every 20 mermaid tears). A player could expect to obtain roughly 170-220 mermaid's tears and glistening tears per hour, depending on the player's know-how of this method, as well as 5-10 unidentified fossils of any kind.

Holes[edit | edit source]

A map of the underwater area, with holes having matching colours to help navigate.

Holes are a sort of transportation mechanic in the Underwater Agility and Thieving training activity. There is a total of ten holes in the Underwater area. Players can enter a hole, which will bring their character to one of the other holes in the Underwater area. Entering a hole will reward the player with 4.5 Agility experience.

The destination each hole links to is fixed. See the image for an overview of linked holes.

Obstacles[edit | edit source]

The southwestern part of the training area consist of an underwater cave section, with multiple enclosed rooms. These rooms are connected to eachother with obstacles. Passing an obstacle will reward the player with 4.5 Agility experience. These obstacles cannot be failed.

Current[edit | edit source]

In the open area of this training area, flowing water currents can be found. These currents will move the character 1 tile every 3 game ticks. The current will also cancel any action the player was trying to perform previously.

Rewards[edit | edit source]

Glistening tears[edit | edit source]

Glistening tears are a form of currency found in the underwater section of Fossil Island. They can be obtained by looting chests and clams in the mermaid's domain. Glistening tears are always obtained alongside a mermaid's tear.

Players can only cash in a maximum of 700 glistening tears at once; if players exchange them for experience with more than 700 glistening tears in the inventory, the excess will be discarded. In addition, they cannot be deposited into a bank.

Depending on the player's know-how of this method, around 170-220 tears can be collected per hour.

Glistening tears can be traded to Mairin in exchange for experience in one of three ways, which is scaled based on the player's levels:

  • Agility and Thieving - 176.4 Agility and 646.8 Thieving experience per glistening tear if both skills are level 99. At level 99, the estimated experience per hour is 38,800 Agility and 142,300 Thieving experience per hour.
  • Agility - 264.6 Agility experience at level 99 per glistening tear. At level 99, the estimated experience per hour is 58,200.
  • Thieving - 970.2 Thieving experience at level 99 per glistening tear. At level 99, the estimated experience per hour is 213,400.

The most efficient way of trading glistening tears is selecting both skills. While it gives less experience in an individual skill, its value is higher than training the two skills independently.

Mermaid's tears[edit | edit source]

Mermaid's tears are a form of currency found in the underwater section of Fossil Island. They can be obtained by looting various chests and clams around the eastern part under the water.

Mermaid tears can be exchanged for items in Mairin's Market, such as unidentified fossils, a merfolk trident, bowls of fish, or seaweed spores.